Material's alpha/opacity creating holes in objects behind it

Hey all, I’ve got a problem where the alpha/opacity of a plant’s leaves (alpha cards) are affecting all layers behind it, so it creates holes in the rendered image. I’ve attached a sample pic, and in the alpha channel you can see where these holes are created in each group of leaves.

Any ideas what could be causing this/how to fix it? I’m stumped as to why the alpha channel of one object would punch holes in everything behind it.

Its not really a bug. Its sort of performance optimization. To solve this you must increase max transparency levels in the render globals, its set to 50 by default so when a ray reaches that depth it’s terminated. If you set it to like 250 or something high it should not show any more holes in the alpha.

Thanks so much Dmitry, that worked perfectly.

By the way I checked out your reel - awesome work!! You’re very talented. Thanks again for your help.